Bosch PLENA Series Bedienungsanleitung

PLENA Mixer amplifier, 4‑zone, 240W

PLE‑4MA240‑CN

en Operation manual

PLENA Mixer amplifier, 4-zone, 240W Table of contents | en 3

Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |

Table of contents

1Safety 4

2About this manual 5

2.1 Manual purpose 5

2.2 Digital document 5

2.3 Intended audience 5

2.4 Alerts and notice signs 5

2.5 Conversion tables 5

2.6 Copyright and disclaimer 6

2.7 Document history 6

3Introduction 7

3.1 The PLENA product range 7

3.2 Parts included 7

3.3 The PLENA Mixer amplifier 7

3.4 Controls, connectors and indicators 9

3.4.1 Front panel 9

3.4.2 Rear panel 10

4Installation 11

4.1 Unpack unit 11

4.2 Install unit in 19" rack (optional) 11

4.3 Check settings/configurations 11

4.4 Connect unit to mains 11

5Connections 12

5.1 Connecting inputs 12

5.1.1 Priority microphone (input 1) 12

5.1.2 Additional microphones (inputs 2 and 3) 12

5.1.3 Emergency inputs 12

5.1.4 Music source inputs 13

5.2 Connecting outputs 13

5.2.1 Connecting loudspeakers 13

6Configuration 14

6.1 Unit settings 14

6.1.1 Rear panel settings 14

6.1.2 Pin settings and labeling 15

7Operation 17

7.1 Switching on and off 17

7.2 Microphone control 17

7.3 Music control 17

7.3.1 Source selection 17

7.3.2 Volume control 17

7.4 Tone control 17

7.5 Output control 17

7.5.1 Zone selection 17

7.5.2 Master volume control 18

8Troubleshooting 19

8.1 Customer service 19

9Maintenance 20

10 Technical data 21

4en | Safety PLENA Mixer amplifier, 4-zone, 240W

2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.

1 Safety

Prior to installing or operating products, always read the Important Safety Instructions which

are available as a separate multilingual document: Important Safety Instructions (Safety_ML).

These instructions are supplied together with all equipment that can be connected to the

mains supply.

Safety precautions

The PLENA Mixer amplifier is designed to be connected to the public distribution network.

– To avoid any risk of electric shock, all interventions must be carried out with

disconnected mains supply.

– The ventilation should not be impeded by covering the ventilation openings with items

such as newspapers, table cloths or curtains.

– Connection of external wiring to this equipment requires installation by qualified

personnel only.

– The operation must only be performed by qualified personnel.

– Use the apparatus in moderate climate.

Caution!

These service instructions are for use by qualified service personnel only.

To reduce the risk of electric shock, do not perform any servicing other than that contained in

the operating instructions unless you are qualified to do so.

PLENA Mixer amplifier, 4-zone, 240W About this manual | en 5

Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |

2 About this manual

Please read this manual carefully before installing and operating the PLENA Mixer amplifier

and retain it for future reference.

2.1 Manual purpose

The purpose of this manual is to provide information required for installing, configuring and

operating a PLENA Mixer amplifier.

2.2 Digital document

This manual is available as a digital document in the Adobe Portable Document Format (PDF).

Refer to the product related information at: www.boschsecurity.com.

2.3 Intended audience

This manual is intended for installers and users of a PLENA system.

2.4 Alerts and notice signs

Four types of signs can be used in this manual. The type is closely related to the effect that

may be caused if it is not observed. These signs - from least severe effect to most severe

effect - are:

Notice!

Containing additional information. Usually, not observing a ‘notice’ does not result in damage

to the equipment or personal injuries.

Caution!

The equipment or the property can be damaged, or persons can be lightly injured if the alert

is not observed.

Warning!

The equipment or the property can be seriously damaged, or persons can be severely injured

if the alert is not observed.

Danger!

Not observing the alert can lead to severe injuries or death.

2.5 Conversion tables

In this manual, SI units are used to express lengths, masses, temperatures etc. These can be

converted to non-metric units using the information provided below.

1 in = 25.4 mm 1 mm = 0.03937 in

1 in = 2.54 cm 1 cm = 0.3937 in

1 ft = 0.3048 m 1 m = 3.281 ft

1 mi = 1.609 km 1 km = 0.622 mi

Tab.2.1: Conversion of units of length

6en | About this manual PLENA Mixer amplifier, 4-zone, 240W

2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.

1 lb = 0.4536 kg 1 kg = 2.2046 lb

Tab.2.2: Conversion of units of mass

1 psi = 68.95 hPa 1 hPa = 0.0145 psi

Tab.2.3: Conversion of units of pressure

Notice!

1 hPa = 1 mbar

°F = _. °C + 32

°C = _. (°F - 32)

°F = 9/5 (°C + 32) °C = 5/9 (°F - 32)

Tab.2.4: Conversion of units of temperature

2.6 Copyright and disclaimer

any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior

written permission of the publisher. For information on getting permission for reprints and

excerpts, contact Bosch Security Systems B.V..

The content and illustrations are subject to change without prior notice.

2.7 Document history

Release date Documentation version Reason

2018.11 V1.0 1st edition.

PLENA Mixer amplifier, 4-zone, 240W Introduction | en 7

Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |

3 Introduction

3.1 The PLENA product range

The PLENA Mixer amplifier is part of the PLENA product range. PLENA provides public address

solutions for places where people gather to work, worship, trade, or relax. It is a family of

system elements that are combined to create commercial audio systems tailored for virtually

any application.

The PLENA product range includes:

– mixers

– preamplifiers

– power amplifiers

– a music source unit

– digital message manager

– a feedback suppressor

– call stations

– an All-in-One system

– a voice alarm system

– a timer

– a charger

– a loop amplifier.

The various elements are designed to complement each other thanks to matched acoustical,

electrical and mechanical specifications.

3.2 Parts included

Quantity Component

1 PLE-4MA240-CN PLENA Mixer amplifier

1 Power cord

1 Set of 19”mounting brackets

1 Manual

1 Important safety instructions

3.3 The PLENA Mixer amplifier

The PLENA Mixer amplifier is a high performance 4-zone mixer amplifier, built on energy

efficient class-D technology. Three selectable music sources, including a front panel 3.5mm

input for hand-held device connection, provide flexibility for background music source.

Multiple levels of priorities and ducking of music make this amplifier an excellent choice for

background music and business paging.

One microphone input (Input 1) can be switched between microphone level and line level

sensitivity. The other two microphone inputs can be connected with XLR or TRS type

connectors. Phantom power can be switched on to provide power to condenser microphones.

8en | Introduction PLENA Mixer amplifier, 4-zone, 240W

2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.

Input 1 can take priority over all other microphone and music inputs: Input 1 priority can be

activated by contact closure on the PTT (push to talk). A 2-tone chime can be configured to

precede an announcement.

The volume of each microphone input can be individually adjusted to obtain the required mix;

the mixed output is controlled via the master volume control and separate high/low tone

controls.

Separate music inputs are available with their own input selector and volume control. The user

can choose a music source like a CD/DVD player or radio (like the PLE-SDT), and set the level

of music. A front panel music input makes it easier to connect a hand-held device as music

source.

A telephone / 100V emergency input is provided for easy integration with a telephone paging

system or another Public Address system. It has its own preset volume control and overrides

all other inputs, including input 1.

The unit also provides a 24V DC output to override remote loudspeaker volume control

whenever there is a telephone or emergency input signal.

The unit has a line output to add amplifiers for larger systems with more output power.

Users can create custom labels for inputs, music sources, and output zones. These labels can

be attached to the special holders at the front of the mixer amplifier. Colored pins can also be

inserted at various positions around the volume and tone controls to indicate favorite settings

for a particular application.

An LED VU meter monitors the master output. A headphone socket, below the VU meter,

provides the mixer output. For total reliability and ease of use, a limiter is integrated into the

output stage to restrict output if the user applies too much signal.

For a schematic overview of the PLENA Mixer amplifier, see figure 3.1.

EMERGENCY

VOX

PTT DETECT

24V

PH-24V

MIC/LINE1

EMG-VOX

GAIN

MIC1-TR

PH SWITCH

MIC2

SOURCE-SELECT

AUX 1

MIC3

GAIN

DUCKING

CLASS D

LIMITER

CLASS D CTRL

B+

CHIME

LINE OUT

ZONE 1~4

MONITOR

VU-METER

MUTE

AUX 2

RELAY

I2C

100V

MIC1/LINE

MIC2

MIC3

AUX

BASS

TREBLE

MASTER VR

Micro

controller

TEL-EMG/MIX

SELECT

LINE-OUT

MUTE

ZONE1~4

AUX1~3

PRIO

CHIME ON/OFF

B+ (50VDC/6A)

+5VDC/1A

+28VDC/1A

SMPS

B+ ON/OFF

+24VDC/500mA

+28VDC

LDO

+3V3/250mA

+5VDC

LDO

+9VDC/100mA

230VAC EMC

24VDC/100mA SUPPLY

24V-PRIO

+24VDC

ZONE1~4 BUTTON

SOURCE BUTTON

FILTER

MIC/LINE

SWITCH

DUCKING

GAIN

ZONE CONTROL

TONE

CONTROL

BASS

TREBLE

MASTER

GAIN

SPI

I2C EEPROM

ADC

ATTN

AUX 3

24V

PH-24V

PH SWITCH

24V

PH-24V PH SWITCH

Figure3.1: Schematic overview of PLE-4MA240-CN

PLENA Mixer amplifier, 4-zone, 240W Introduction | en 9

Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |

3.4 Controls, connectors and indicators

3.4.1 Front panel

Number Description

1 Power button, with power-on LED.

2 Label holder for user-defined description of microphone/line 1 and microphone

2 and 3 inputs. Custom labels can be created by user.

3 Label holder for user-defined description of music sources (Aux 1, 2 and 3).

Custom labels can be created by user.

4 High tone (treble) control knob for mixed output.

5 Label holder for user-defined description of zone names. Custom labels can be

created by user.

6 Master volume control knob. It controls all inputs except emergency.

7 LED VU meter for master output, with LEDs for -18, -12 -6, -3, 0 dB.

8 Input level control knobs for:

• microphone/line 1

• microphone 2

• microphone 3.

9 Music source selector (for Aux inputs 1, 2, and 3). Selected Aux input LED

switches on (green), unselected Aux input LEDs remain off.

10 Aux-3: Music input with 3.5 mm mini-TRS connector for a music source like a

mobile phone or laptop. Stereo signals are converted into mono.

11 Volume control knob for selected music source input.

12 Low tone (bass) control knob for mixed output.

13-16 Zone 1 to 4 selection buttons with LED indicator.

17 Headphone socket.

10 en | Introduction PLENA Mixer amplifier, 4-zone, 240W

2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.

3.4.2 Rear panel

1 2 3 4 10 125 6 7 8 9 11

Emergency/Telephone Rated input power 360W

Cal l

Duck in g

Aux2

Aux1

Gnd

Line O ut

Z1 Z2 Z3 Z4

24V

DC out

Prio ri ty

0100V

+0100V0100V0100VT4.

L 25 0V

23 022 0 -V~5 Hz

Gnd

Number Description

1 Telephone / 100V emergency input volume control knob - from -20 dB to 0 dB.

2 Telephone / 100V emergency input, with Euro style pluggable screw terminal

connector. This input has the highest priority amongst all inputs.

100V emergency input shall be connected to pins marked as 100V and 0V;

telephone signal (through coupler) shall be connected to +,Gnd, -.

3 DIP switch for microphone/line 1 with selection for: line/mic level, chime tone

on/off, phantom power (24V), and PTT (push to talk).

4 Microphone/line 1 input, with 5-pin Euro style pluggable screw terminal

connector. Balanced mic/line input (3 pins), remaining 2 pins for trigger input, if

these two pins are not connected this input will be mixed with other inputs

without priority.

5 Microphone 2 input, with combo (XLR +TRS) balanced signal input connector.

6 DIP switch for microphone 2 and 3 with selection for phantom power (18VDC).

7 Microphone 3 input, with combo (XLR +TRS) balanced signal input connector.

8 Ducking level control knob for microphone/line 1 input. It sets the required BGM

(background music) level when trigger (PTT) is active.

9 Aux-1 and 2: Music inputs with Cinch connector for a music source like a CD/DVD

player or radio. Stereo signals are converted into mono.

10 Line-out: Balanced line-level output (nominal level: 1V) for system expansion,

with 3-pin Euro style pluggable screw terminal connector.

11 Loudspeaker outputs:

– Zone 1 to 4 outputs, Euro style pluggable screw terminal connector - 100 V.

– 24V DC output for loudspeaker volume control override. It is activated when

there is a telephone or emergency input signal.

12 Earth connection screw.

13 Mains connector (3-pole) with fuse inside.

Notice!

The unit must be earthed.

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